7271. In Mcabe-Thiele method, at infinite reflux ratio
Number of plates is maximum
Overhead product is maximum
Both the operating lines coincide with the diagram
None of these
✅ The correct answer is option C.
Chemical Engineering
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7272. In case of gases, the binary diffusivity is proportional to (where, P = pressure)
P
1/P
1/√P
√P
✅ The correct answer is option B.
7273. Drying operation under vacuum is carried out to
Dry those materials which have very high unbound mositure content
Reduce drying temperature
Increase drying temperature
Dry materials having high bound moisture content
✅ The correct answer is option B.
7275. Which of the following unit operations makes use of Thiele-Geddes equation?
Liquid-liquid extraction
Solid-liquid extraction
Multicomponent absorption with chemical reaction
Multicomponent distillation
✅ The correct answer is option D.
7276. In a packed bed absorption column, the channelling will be noted by the
Increase in flow rate
Sharp drop in pressure drop
Sharp rise in pressure drop
None of these
✅ The correct answer is option B.
7277. Henry’s law states that the
Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
Partial pressure of a component over a solution is proportional to the mole fraction in the vapour
Vapour pressure is equal to the product of the mole fraction and total pressure
Partial pressure is equal to the product of the mole fraction and total pressure
✅ The correct answer is option A.
7278. Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?
Sieve plate column
Bubble cap column
Randomly packed column
Wetted wall column
✅ The correct answer is option D.
7279. For absorbing a sparingly soluble gas in a liquid
Gas side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be decreased
Mass transfer co-efficient must be kept constant
✅ The correct answer is option B.
7280. When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.
1
< 1
> 1
?
✅ The correct answer is option A.